/*
 * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
 * Copyright (c) 2020-2022 Huawei Device Co., Ltd. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 * conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
 * of conditions and the following disclaimer in the documentation and/or other materials
 * provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
 * to endorse or promote products derived from this software without specific prior written
 * permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "It_test_IO.h"
#include "signal.h"
#include "pthread.h"

static UINT32 testcase(VOID)
{
    fd_set fdSet;
    int pipeRet, epFd, epFd2,epFd3, epollCtlRet, epollWaitRet, writeRet;
    pid_t pid;
    int pipeFd[2];
    char buffer[40];
    int i = 0;
    int status;
    struct epoll_event ev, events[3];

    pipeRet = pipe(pipeFd);
    ICUNIT_GOTO_EQUAL(pipeRet, 0, pipeRet, OUT);

    FD_ZERO(&fdSet);
    FD_SET(pipeFd[0], &fdSet);

    epFd = epoll_create(-1);
    std::cout << "epoll_create returned value epFd->:" << epFd << std::endl;
    ICUNIT_GOTO_NOT_EQUAL(epFd, -1, epFd, OUT);

    epFd2 = epoll_create(0);
    std::cout << "epoll_create returned value epFd2->:" << epFd << std::endl;
    ICUNIT_GOTO_NOT_EQUAL(epFd, -1, epFd, OUT);

    epFd3 = epoll_create(100);
    std::cout << "epoll_create returned value epFd3->:" << epFd << std::endl;
    ICUNIT_GOTO_NOT_EQUAL(epFd, -1, epFd, OUT);

    ev.events = EPOLLWRNORM | EPOLLOUT | EPOLLRDNORM | EPOLLIN;
    epollCtlRet = epoll_ctl(epFd, EPOLL_CTL_ADD, pipeFd[0], &ev);
    std::cout << "epoll control returned value:" << epollCtlRet << std::endl;
    ICUNIT_GOTO_NOT_EQUAL(epollCtlRet, -1, epollCtlRet, OUT);

    pid = fork();
    if (pid == 0) {
        close(pipeFd[1]);

        memset(events, 0, sizeof(struct epoll_event) * 3); /* 3, evs num */
        epollWaitRet = epoll_wait(epFd, events, 3, 3000); /* 2, num of wait fd. 3000, wait time */
        std::cout << "epoll wait returned value:" << epollWaitRet << std::endl;
        close(pipeFd[0]);

        if (epollWaitRet) {
            exit(LOS_OK);
        } else {
            exit(LOS_NOK);
        }
    } else {
        sleep(1);
        close(pipeFd[0]);
        writeRet = write(pipeFd[1], "Epoll fd is actually a file descriptor.", 39); /* write 39 bytes to stdin(fd 0) */
        std::cout << "write() returned value is:" << writeRet << std::endl;
        ICUNIT_GOTO_EQUAL(writeRet, 39, writeRet, OUT);
        close(pipeFd[1]);

        wait(&status);
        status = WEXITSTATUS(status);
        ICUNIT_ASSERT_EQUAL(status, LOS_OK, status);
    }

    return LOS_OK;
OUT:
    close(pipeFd[0]);
    close(pipeFd[1]);
    close(epFd);
    return LOS_NOK;
}

VOID IO_TEST_EPOLL_003(VOID)
{
    TEST_ADD_CASE(__FUNCTION__, testcase, TEST_LIB, TEST_LIBC, TEST_LEVEL1, TEST_FUNCTION);
}
